February 24 – Marshall Rothstein is nominated to the Supreme Court of Canada by Prime Minister Stephen Harper. Rothstein will be the first Supreme Court nominee to face an all-party committee hearing in Parliament before his appointment is confirmed.
May 31 – 100 millimeters of rain in a few hours caused landslides in and around the small town of La Tuque, in central Quebec, damaging roads and flooding houses. State emergency was decreed right away and people were evacuated.
June 2 – Terrorism plot—more than 400 police officers raided homes in Toronto and Mississauga, Ontario, and arrest 15 people (10 men and five youths), part of a terrorist cell. All men were born in Canada and were reportedly planning to attack the Parliament in Ottawa, the Bank of Toronto, some military installations, kidnap deputies and try to behead the Prime Minister Stephen Harper.
August 2 – The day after record-breaking heat in Ontario and Quebec and just two weeks following another series of powerful storms, severe thunderstorms hit a vast swath of Cottage country in central and eastern Ontario. Eight confirmed tornadoes touch down, the single largest one-day outbreak in the province since 1985. The two strongest tornadoes are rated F2, one near Bancroft and other a direct hit on the town of Combermere in Renfrew County. Close to 200,000 residents lose power in the storms and more than 20,000 remain without power for over one week after the event. Extensive property and forest damage results. Amazingly no fatalities result.
October 3 – Shawn Graham becomes premier of New Brunswick, replacing Bernard Lord.
October 4 – The Turner Review and Investigation is released. Prompted by the murder of Zachary Turner, the report concluded that the infant's death was preventable and that Newfoundland and Labrador's social services system did not adequately act to protect him from his mother.
October 18 – MP Garth Turner is suspended from the Conservative caucus for criticizing Prime Minister Stephen Harper in his online blog.
October 19 – Environment Minister Rona Ambrose introduces the controversial Clean Air Act, which is criticized by environmentalists and Opposition politicians for offering virtually no substantive action on climate change until at least 2011. During debate on the act, several Opposition politicians allege that they hear External Affairs Minister Peter MacKay refer to Liberal MP Belinda Stronach as a dog.
December 8 - Stephen Harper announces the Canada's Chemical Management Plan; a program made up of various initiatives that focus on monitoring, research, assessment, regulation, and enforcement of chemicals.
October 11 – Media reports announce that Bon Cop, Bad Cop has beaten Porky's to become the top-grossing Canadian film of all time in domestic box office; these are later disputed as not having taken inflation into account.